Jacob Tremblay as Elmer Elevator (voice)

Gaten Matarazzo as Boris the Dragon (voice)

Golshifteh Farahani as Dela Elevator (voice)

Dianne Wiest as Iris the Rhinoceros (voice)

Rita Moreno as Mrs. McClaren (voice)

Chris O'Dowd as Kwan the Macaque (voice)

Judy Greer as Soda the Whale (voice)

Alan Cumming as Cornelius the Crocodile (voice)

Yara Shahidi as Callie (voice)

Jackie Earle Haley as Tamir the Tarsier (voice)

Mary Kay Place as Narrator (voice)

Leighton Meester as Sasha (voice)

Spence Moore II as George (voice)

Adam Brody as Bob (voice)

Charlyne Yi as Magda (voice)

Jack S. A. Smith as Eugene (voice)

Maggie Lincoln as Gertie (voice)

Whoopi Goldberg as Cat (voice)

Ian McShane as Saiwa (voice)

Debi Derryberry as Additional voices (voice)

Skip Stellrecht as Additional voices (voice)

Hope Levy as Additional Voices (voice)

Terence Matthews II as Additional voices (voice)

Annabel Lew as Additional voices (voice)

Andrew Morgado as Additional voices (voice)

Jim Pirri as Additional voices (voice)

Jon Olson as Additional voices (voice)

Cat Ring as Additional voices (voice)

Fred Tatasciore as Additional voices (voice)

Michelle Ruff as Additional voices (voice)

Georgia Simon as Additional voices (voice)

Eric Tiede as Additional voices (voice)

Frank Todaro as Additional voices (voice)

Kelly Stables as Additional voices (voice)

Nora Twomey as Additional voices (voice)